Gay C C, McCarthy M, Carter J, Reynolds W T
Am J Vet Res. 1978 Aug;39(8):1322-6.
Temporal relationships between the left apex cardiogram (ACG) and left ventricular and aortic pressure events were studied in 10 anesthetized Greyhound dogs. A close relationship existed between onset of the upstrokes of the ACG and left ventricular pressure. The nadir of the protosystolic upstroke of the ACG invariably occurred after the peak rate of change of left ventricular pressure increase (d/dt)LVP and the onset of aortic pressure increase, but occurred virtually simultaneously with the peak rate of change of aortic pressure increase (d/dt)A. The relationship between the protodiastolic nadir of the downstroke of left ventricular pressure and that of the ACG was close but variable. The ACG could be of value as a noninvasive examination technique in canine cardiovascular studies.
在10只麻醉的灵缇犬中研究了左心尖心电图（ACG）与左心室及主动脉压力事件之间的时间关系。ACG上升支的起始与左心室压力之间存在密切关系。ACG原收缩期上升支的最低点总是出现在左心室压力上升变化率峰值（d/dt）LVP和主动脉压力上升起始之后，但实际上与主动脉压力上升变化率峰值（d/dt）A同时出现。左心室压力下降支舒张前期最低点与ACG的最低点之间关系密切但存在变化。在犬类心血管研究中，ACG作为一种非侵入性检查技术可能具有价值。
